\[\mathbf{Страница\ 62.}\]
\[\boxed{\mathbf{4.}}\]
\[\textbf{а)}\ AEBD;ETCD;ADCT;ODCT.\]
\[\textbf{б)}\ ABCD;BNAC;BMAC;KBDA;\]
\[OBDA;TBDA;\]
\[DTCB;BETC;BQTC;BGTC;\]
\[CKOT;FOBE;\]
\[FOBQ;FOBG;FOBD;MQGN;\]
\[MQEA;MQFA;\]
\[GNAE;GNAF;ATQM;ATGN;\]
\[TCKF;FKBE;\]
\[FKBQ;FKBG;FKBD.\]
\[\boxed{\mathbf{5.}}\]
\[\textbf{а)}\ ABC;ABCD;ABCE.\]
\[\textbf{б)}\ ACE;ADE;ADC.\]
\[\boxed{\mathbf{6.}}\]
\[P = 3 + 4 + 5 = 12\ см.\]